how to stack two lists in python code example

Example 1: add two list in python

list1 = ["a", "b" , "c"]
list2 = [1, 2, 3]

list1.extend(list2)
print(list1)

Example 2: combine to lists python

listone = [1,2,3]
listtwo = [4,5,6]

joinedlist = listone + listtwo